Initial commit of OpenSPARC T2 architecture model.

[OpenSPARC-T2-SAM] / sam-t2 / devtools / v8plus / lib / python2.4 / dircache.py

"""Read and cache directory listings.

The listdir() routine returns a sorted list of the files in a directory,
using a cache to avoid reading the directory more often than necessary.
The annotate() routine appends slashes to directories."""

import os

__all__ = ["listdir", "opendir", "annotate", "reset"]

cache = {}

def reset():
   """Reset the cache completely."""
   global cache
   cache = {}

def listdir(path):
   """List directory contents, using cache."""
   try:
       cached_mtime, list = cache[path]
       del cache[path]
   except KeyError:
       cached_mtime, list = -1, []
   mtime = os.stat(path).st_mtime
   if mtime != cached_mtime:
       list = os.listdir(path)
       list.sort()
   cache[path] = mtime, list
   return list

opendir = listdir # XXX backward compatibility

def annotate(head, list):
   """Add '/' suffixes to directories."""
   for i in range(len(list)):
       if os.path.isdir(os.path.join(head, list[i])):
           list[i] = list[i] + '/'